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First In-situ Evidence of Pancaked ICME and it's Distinct Plasma Characteristics Compare to Non-Pancaked ICME during Solar Cycles 23 and 24

Zubair Shaikh - Indian Institute of Geomagnetism (IIG); Anil Raghav - University of Mumbai, India

Session: Interplanetary CMEs and Solar Particle Events


The decade study suggests that magnetic topology of an ICME can be cylindrical, toroidal, elongated elliptical, etc. In addition to this, several remote observations and models/simulations suggest that ICME can show 'pancaked' structure as well. Here, for the first time, in-situ observation of pancaked ICME at 1 AU are investigated using PMS analysis technique. The additional statistical investigation was performed for 468 ICME from 1998 to 2017. We reveal that ~ 30% ICME shows planar whereas ~ 70% are non-planar signature. The average plasma parameters i.e., plasma temperature, density, speed, beta, thermal pressure, and magnetic pressure in the planar ICME is significantly higher compared to non-planar ICME. This indicates that planar MCs are highly compressed. The double-strength of the southward/northward magnetic field component associated with planar ICME clearly implies that it is more geo-effective than the non-planar ICME. We believe that the above study is very useful for ICME arrival time predication, solar-terrestrial physics, space weather physics, etc.

Approaching deadlines:

Registration opens:

16 July 2020

Abstract submission opens:

16 July 2020

European Space Weather Medals:

6 September 2020

Registration deadline:

25 September 2020

Registration deadline: [extended]

10 October 2020

Abstract submission deadline:

4 September 2020